The Rend event is triggered by people falling in the middle of that 'pit'. To the left is the big gate for dragons to come. To the right is the exit that opens after Rend is beaten. The normal procedure is to jump directly down. But there's also a ramp which can be taken, requiring the clearing of one or two additional packs.

I never saw anyone take this ramp, beside mis-managed pets.

Did anyone ever take the ramp? I'm sure the first few groups did, but did you, whenever you played, see the ramp get used?